Swing bed



FIG. 1 is a right side elevational view of a swing bed;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front perspective view thereof; and,

FIG. 4 is a rear perspective view thereof.

The broken line showing of two pillows in FIGS. 1, 3 and 4 illustrates portions of the swing bed that form no part of the claimed design. 

CLAIM The ornamental design for a swing bed, as shown and described. 